NYSE:TGEN | Historical Stock Price | TECOGEN INC.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2014-05-20 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.60$1.06$1.87$3.30$5.83$10.292014-05-202026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$4.94$4.94421,800
2025-12-30$4.92$4.92574,200
2025-12-29$5.09$5.09375,000
2025-12-26$5.18$5.18420,100
2025-12-24$5.33$5.33222,000
2025-12-23$5.23$5.23363,500
2025-12-22$5.11$5.11637,000
2025-12-19$5.04$5.042,087,000
2025-12-18$4.70$4.701,403,200
2025-12-17$4.78$4.781,782,800
2025-12-16$5.34$5.34699,200
2025-12-15$5.84$5.84442,800
2025-12-12$6.03$6.03534,500
2025-12-11$6.47$6.47483,200
2025-12-10$6.56$6.56300,000
2025-12-09$6.79$6.79279,400
2025-12-08$6.85$6.85287,700
2025-12-05$7.01$7.01316,400
2025-12-04$7.30$7.30543,200
2025-12-03$7.05$7.05333,100
2025-12-02$6.44$6.44270,300
2025-12-01$6.50$6.50820,600
2025-11-28$7.46$7.46344,900
2025-11-26$7.00$7.00409,000
2025-11-25$6.88$6.88274,900
2025-11-24$6.80$6.80335,400
2025-11-21$6.50$6.501,088,800
2025-11-20$6.22$6.22761,000
2025-11-19$6.16$6.16663,400
2025-11-18$6.34$6.34526,200
2025-11-17$6.23$6.23655,900
2025-11-14$6.51$6.511,183,600
2025-11-13$6.94$6.941,154,400
2025-11-12$7.38$7.381,135,300
2025-11-11$7.68$7.68481,800
2025-11-10$8.16$8.16393,800
2025-11-07$8.31$8.31615,700
2025-11-06$8.16$8.16750,600
2025-11-05$8.82$8.82511,300
2025-11-04$9.35$9.35476,000
2025-11-03$9.73$9.73527,700
2025-10-31$9.98$9.98591,900
2025-10-30$9.59$9.591,807,800
2025-10-29$9.48$9.481,181,700
2025-10-28$8.27$8.27301,300
2025-10-27$8.66$8.66339,800
2025-10-24$8.74$8.74447,200
2025-10-23$8.46$8.46368,200
2025-10-22$8.42$8.42843,800
2025-10-21$8.89$8.89618,600
2025-10-20$8.96$8.96731,200
2025-10-17$9.39$9.392,056,700
2025-10-16$10.36$10.361,349,700
2025-10-15$12.07$12.072,810,300
2025-10-14$9.53$9.531,366,500
2025-10-13$8.92$8.92940,900
2025-10-10$7.94$7.941,140,900
2025-10-09$8.95$8.95371,400
2025-10-08$8.91$8.91494,200
2025-10-07$9.18$9.18818,300
2025-10-06$9.80$9.80924,800
2025-10-03$9.22$9.22819,100
2025-10-02$9.10$9.10814,300
2025-10-01$8.40$8.40457,700
2025-09-30$8.81$8.81616,100
2025-09-29$8.21$8.21728,100
2025-09-26$7.85$7.85580,000
2025-09-25$8.17$8.17661,200
2025-09-24$8.55$8.55503,200
2025-09-23$8.72$8.721,288,100
2025-09-22$9.06$9.061,186,300
2025-09-19$8.75$8.751,668,100
2025-09-18$7.29$7.29556,600
2025-09-17$7.11$7.11432,100
2025-09-16$7.01$7.01541,300
2025-09-15$7.35$7.35495,300
2025-09-12$6.85$6.85359,000
2025-09-11$7.09$7.09459,600
2025-09-10$7.17$7.17704,300
2025-09-09$6.63$6.631,105,100
2025-09-08$6.61$6.611,233,300
2025-09-05$7.04$7.04562,000
2025-09-04$7.01$7.01565,900
2025-09-03$7.02$7.02825,800
2025-09-02$7.40$7.40522,600
2025-08-29$7.64$7.64520,500
2025-08-28$7.73$7.73496,600
2025-08-27$7.89$7.89495,200
2025-08-26$8.33$8.33554,200
2025-08-25$8.63$8.63580,000
2025-08-22$9.09$9.09585,800
2025-08-21$8.49$8.49327,700
2025-08-20$8.19$8.191,097,700
2025-08-19$8.56$8.56979,000
2025-08-18$9.52$9.521,112,400
2025-08-15$8.29$8.29775,300
2025-08-14$8.93$8.931,513,700
2025-08-13$8.61$8.612,545,000
2025-08-12$8.82$8.82927,900
2025-08-11$9.02$9.02779,500
2025-08-08$9.43$9.431,293,200
2025-08-07$8.36$8.36959,800
2025-08-06$9.19$9.191,172,500
2025-08-05$8.48$8.48613,000
2025-08-04$9.10$9.10768,900
2025-08-01$9.18$9.18975,300
2025-07-31$9.68$9.681,654,800
2025-07-30$8.38$8.381,035,000
2025-07-29$7.43$7.43454,100
2025-07-28$7.93$7.93673,700
2025-07-25$8.50$8.50277,500
2025-07-24$8.35$8.35577,700
2025-07-23$8.39$8.391,267,600
2025-07-22$7.01$7.01935,600
2025-07-21$7.10$7.101,301,800
2025-07-18$7.72$7.725,792,300
2025-07-17$5.78$5.781,923,600
2025-07-16$6.08$6.081,180,800
2025-07-15$6.32$6.321,282,600
2025-07-14$7.50$7.50484,500
2025-07-11$7.93$7.93281,400
2025-07-10$8.16$8.16450,000
2025-07-09$8.73$8.73207,600
2025-07-08$8.43$8.43467,400
2025-07-07$7.95$7.95460,800
2025-07-03$8.34$8.34433,200
2025-07-02$9.13$9.131,330,900
2025-07-01$7.08$7.08528,200
2025-06-30$6.80$6.80324,000
2025-06-27$7.15$7.15253,300
2025-06-26$7.49$7.49409,800
2025-06-25$6.91$6.91370,400
2025-06-24$7.32$7.32763,400
2025-06-23$7.42$7.421,013,100
2025-06-20$6.13$6.131,466,100
2025-06-18$6.18$6.18381,600
2025-06-17$5.90$5.90575,700
2025-06-16$6.35$6.35337,100
2025-06-13$5.76$5.76167,300
2025-06-12$6.18$6.18240,000
2025-06-11$6.10$6.10347,700
2025-06-10$6.15$6.15278,900
2025-06-09$5.78$5.78590,300
2025-06-06$6.00$6.00706,400
2025-06-05$5.32$5.32237,900
2025-06-04$5.29$5.29470,400
2025-06-03$4.87$4.87508,800
2025-06-02$4.69$4.69176,800
2025-05-30$4.74$4.74299,800
2025-05-29$4.79$4.79328,800
2025-05-28$4.99$4.99300,300
2025-05-27$4.84$4.84605,000
2025-05-23$4.60$4.60561,900
2025-05-22$4.65$4.65397,100
2025-05-21$4.36$4.36555,900
2025-05-20$4.34$4.34384,900
2025-05-19$4.50$4.501,360,200
2025-05-16$4.35$4.35848,100
2025-05-15$3.51$3.51171,400
2025-05-14$3.53$3.53495,500
2025-05-13$3.95$3.95820,500
2025-05-12$3.40$3.40540,000
2025-05-09$3.17$3.17267,100
2025-05-08$3.40$3.40152,300
2025-05-07$3.23$3.23287,100
2025-05-06$3.25$3.25401,700
2025-05-05$3.10$3.10233,400
2025-05-02$2.68$2.68207,700
2025-05-01$2.73$2.73785,400
2025-04-30$2.47$2.47251,000
2025-04-29$2.47$2.47215,300
2025-04-28$2.30$2.30333,800
2025-04-25$2.15$2.1599,600
2025-04-24$2.01$2.0167,400
2025-04-23$1.99$1.9946,900
2025-04-22$1.95$1.959,800
2025-04-21$1.89$1.8951,400
2025-04-17$1.88$1.885,100
2025-04-16$1.83$1.8335,300
2025-04-15$1.88$1.8824,400
2025-04-14$1.85$1.8579,700
2025-04-11$1.84$1.8447,600
2025-04-10$1.85$1.8535,400
2025-04-09$2.03$2.0342,000
2025-04-08$1.84$1.8457,600
2025-04-07$1.85$1.8593,700
2025-04-04$1.94$1.94173,200
2025-04-03$2.05$2.05236,600
2025-04-02$2.32$2.3234,300
2025-04-01$2.17$2.1728,300
2025-03-31$2.23$2.23119,300
2025-03-28$2.27$2.2738,100
2025-03-27$2.27$2.2789,800
2025-03-26$2.61$2.6167,200
2025-03-25$2.60$2.6064,500
2025-03-24$2.46$2.4625,100
2025-03-21$2.42$2.4214,300
2025-03-20$2.51$2.5173,000
2025-03-19$2.46$2.46131,400
2025-03-18$2.15$2.15230,200
2025-03-17$2.57$2.57352,700
2025-03-14$2.15$2.1538,200
2025-03-13$2.14$2.1420,200
2025-03-12$2.14$2.1481,500
2025-03-11$2.20$2.20128,700
2025-03-10$2.20$2.20236,400
2025-03-07$2.40$2.40132,700
2025-03-06$2.33$2.33264,200
2025-03-05$2.31$2.3151,700
2025-03-04$2.35$2.35198,500
2025-03-03$2.27$2.271,425,700
2025-02-28$1.74$1.7447,000
2025-02-27$1.81$1.8112,300
2025-02-26$1.94$1.9450,100
2025-02-25$1.66$1.66131,200
2025-02-24$1.94$1.9498,500
2025-02-21$1.91$1.91195,500
2025-02-20$2.26$2.26162,300
2025-02-19$2.37$2.37133,100
2025-02-18$2.26$2.2693,700
2025-02-14$2.34$2.34115,500
2025-02-13$2.22$2.22406,000
2025-02-12$2.43$2.43202,300
2025-02-11$2.68$2.68103,800
2025-02-10$3.00$3.0070,900
2025-02-07$3.00$3.00104,600
2025-02-06$3.09$3.09150,500
2025-02-05$3.29$3.29222,200
2025-02-04$2.80$2.8095,900
2025-02-03$2.90$2.90456,000
2025-01-31$2.41$2.41107,600
2025-01-30$2.51$2.51123,900
2025-01-29$2.31$2.31101,400
2025-01-28$2.39$2.39256,400
2025-01-27$2.14$2.14360,100
2025-01-24$2.94$2.94236,000
2025-01-23$3.32$3.32166,500
2025-01-22$3.17$3.17567,600
2025-01-21$2.88$2.88179,000
2025-01-17$2.66$2.6642,800
2025-01-16$2.80$2.8085,700
2025-01-15$2.62$2.62131,900
2025-01-14$2.65$2.65265,000
2025-01-13$2.69$2.69285,400
2025-01-10$2.65$2.65632,800
2025-01-08$2.22$2.22258,000
2025-01-07$2.23$2.23383,800
2025-01-06$1.87$1.87151,200
2025-01-03$1.80$1.8068,500
2025-01-02$1.55$1.5542,700